Flotation device for separating valuable ingredients, e.g. metal concentrates, from remaining material in slurry, has shaft sealed in flotation cell by mechanical sealing member

摘要

The invention relates to novel protected 3.5-dihydroxy-2.2-dimethyl-valeroamides for the synthesis of epothilones and derivatives and to a method for the production and e use of said novel compounds in the production of epothilones or epothilone derivatives.